Dynamo-electric machine



(No Model.)

Y E. B. CUTTEN.

DYNAMO ELEGTRIG MACHINE. No. 308,832. Patented Dec. 2, 1884.

'F J WITNESSE INVENTOR: J /XZJMQ/ W'Ww I BY c7 ATTORNEYS.

UNITED STATES PATENT OFFICE.

ELISHA BARTON OUTTEN, OF KINGSBRIDGE, NEW YORK, ASSIGNOR TO THE ELECTRICAL AND MECHANICAL DEVELOPING COMPANY, OF PITTSBURG,

PENNSYLVANIA.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part: of Letters Patent No. 308,832, dated December 2, 1884.

Application filed July 11, 1883. Renewed March 12, 1884. (No model.) Patented in Germany April 6, 1884, No. "28.9.35, and in England July 18, 1884, No. 10,323.

To aZZ whom it may concern.-

Be it known that I, ELISHA Ban'ron CUT- TEN, of Kingsbridge, in the city, county, and State of New York, have invented a new and 5 useful Improvement in Dynamo-Electric Machines, of which the following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming a part of this specification,

1c in which similar letters of reference indicate corresponding parts in all the figures.-

Figure l is a side elevation, partly in section, of a machine embodying my improve ment. Fig. 2 is an end elevation of the same,

15 partly in section. Fig. 3 is a sectional plan view of one-half of the field-magnet, taken through the line m 00, Fig. 2. Fig. 4 is a plan viewof one-half of the field-magnet, the connecting-yoke and the wire being removed.

The object of this invention is to obtain a sufficiently strong field with less iron and less wire, and consequently a lower resistance and a smaller percentage of power, than are now used. 2 The invention consists in adynamo-electric machine constructed with the parts of the field-magnet that receive the wire tapered from the pole-pieces to the yoke, as will be hereinafter fully described.

A are the arms of the electro'magnet, which are connected at their upper ends by an iron yoke, B, firmly bolted to them. The arms A are made with their inner or adjacent sides vertical, and with their edges and outer sides 35 inclined or tapered, as shown in Figs. 2, 3,

and 4. The pole-pieces O are connected at each end by a piece of non-magnetic metal, D, which serves as a bearing for the armature E. The armature E is of the Siemens type, and is 0 too well known to require a description.

Upon the bases of the pole-pieces O are formed small cars F, of iron, to receive the bolts that secure the machine to its wooden base G, and which project a little below the bases of the said pole-pieces C to elevate the machine a little above its base G, to allow the heat generated in the machine to escape freely by radiation.

The pole-pieces O are made heavy, and the arms A of the field'magnet are tapered, so that the upper portions surrounded by the coilsH willhaveabout one-half the circumference of the lower portions. \Vith this construction the resistance will be decreased without decreasing the number of turns of wire, and without a proportional decrease in the strength of the field.

I do not abandon or dedicate to the public any patentable features set forth herein and not hereinafter claimed, but reserve the right to claim the same either in a reissue of any patent that may be granted upon this application or in other applications forLetters Patent that I may make.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- The eleetro-magnet arms A, having the innor side perpendicular, the outer inclined, and the upper ends connected by a yoke bolted to each one of them, in combination with the pole-pieces 0, having non-magnetic connections D, and the armature E, proi ided with bearings in said connections D, whereby the resistance will be decreased without a corresponding decrease in the wire-turns or the strength of the field, as described.

ELTSHA BARTON CUTTEN.

Witnesses:

JAMES T. GRAHAM, EDGAR TATE. 

